Knowles Electronics, Inc.

Other

John Nielsen

Anders Svava Mortensen

Claus Erdmann Fürst

Jacob Midtgaard

Aziz Yurttas

Dibyendu Nandy

Robert A Popper

Rasmus Glarborg Jensen

Tommas Jess Christensen

Olfert Paul Paulsen

Rene Rye Larsen

Paul Fielding Smith

Selvakumar Sivarajah

Aziz Yurrtas

Jens J G Henriksen

Morten Vested Olesen

Abdulah Korishe

Didier Clement

The disclosure describes soft limiting electrical signals generated by a transducer before amplification, buffering or other signal conditioning in a microphone assembly, circuits and methods therefor. The soft limiting circuit includes a first circuit portion that limits a first portion of the electrical signal with reduced distortion when the first portion of the signal exceeds a threshold. A second circuit portion of the soft limiting circuit similarly limits a second portion of the electrical signal. In this way, overloading of an amplifier is avoided without excessive distortion.

Microphone assembly with improved overload performance

An apparatus includes a microelectromechanical system (MEMS) device having a diaphragm and a back plate; a clipping circuit coupled to the MEMS device, wherein the clipping circuit is configured to clip an output signal of the MEMS device so that the maximum signal drawn by a buffer is substantially constant over a temperature range; and an integrated circuit coupled to the clipping circuit, the integrated circuit including the buffer.

Microphone with soft clipping circuit

A driver, includes a driver block, a controller block, and a comparison block. The driver block includes an adjustable current source configured to produce a digital output stream. The controller block is coupled to the driver block. The comparison block is coupled to the driver block and the controller block. The comparison block is configured to compare the digital output stream to a reference value at a time delayed with respect to a master clock and based upon the comparison cause the controller block to adjust a strength of the driver block.

Slew rate control apparatus for digital microphones

A microphone includes a base, a micro electro mechanical system (MEMS) device disposed on the base, and a front end processing apparatus disposed on the base and coupled to the MEMS device, the front end processing apparatus being configured to convert analog signals received from the MEMS device into digital signals. The microphone also includes a DSP apparatus, the DSP apparatus being a digital programmed device with a computer memory, the DSP apparatus configured to process the digital signals received from the front end processing apparatus. The MEMS device, the front end processing apparatus, and DSP apparatus are enclosed within a single microphone enclosure or assembly. During operation the DSP apparatus generates DSP noise. The DSP apparatus includes a noise reduction structure that substantially prevents the DSP noise from reaching or interfering with the operation of the MEMS device or the front end processing apparatus.

Signal processing platform in an acoustic capture device

In embodiments of the present invention improved capabilities are described for a communications facility that is adapted to communicate with at least one other mesh network node at a communication speed selected from a plurality of communication speeds.

Multi-speed mesh networks

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Hillerod, Denmark

John Nielsen